ramips: Fix Hongdian H8922 v30 pinctrl default state

According to the MT7620A hardware datasheet, GPIO/14 was originally used for RIN of UARTF, but is now used as the WPS LED.

Corrected pinctrl to ensure it works properly in the future.

Signed-off-by: Coia Prant <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/18278
Link: https://github.com/openwrt/openwrt/pull/18279
Signed-off-by: Hauke Mehrtens <[email protected]>
(cherry picked from commit 612bedaf5b0a0186e34e521ebfc122404aeff265)

target/linux/ramips/dts/mt7620a_hongdian_h8922-v30.dts

@@ -145,7 +145,7 @@
 
 &state_default {
 	gpio {
-		groups = "wled", "rgmii1", "rgmii2";
+		groups = "uartf", "wled", "rgmii1", "rgmii2";
 		function = "gpio";
 	};
 };